description: Link to an actual medication administration record with the full details of the administration, if a link is known. package_name: hl7.fhir.core derivation: constraint name: administration type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/openEHR-administration'} index: 1 valueReference: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/MedicationAdministration'] index: 2 package_version: 3.5.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/openEHR-administration base: http://hl7.org/fhir/StructureDefinition/Extension version: null